Embodiments of the present invention relate to glass compositions, glass fibers formed from such compositions, and related products. In one embodiment, a glass composition comprises 58-62 weight percent SiO2, 14-17 weight percent Al2O3, 14-17.5 weight percent CaO, and 6-9 weight percent MgO, wherein
Embodiments of the present invention relate to glass compositions, glass fibers formed from such compositions, and related products. In one embodiment, a glass composition comprises 58-62 weight percent SiO2, 14-17 weight percent Al2O3, 14-17.5 weight percent CaO, and 6-9 weight percent MgO, wherein the amount of Na2O is 0.09 weight percent or less.
대표청구항▼
1. A glass composition comprising: 60-62 weight percent SiO2;14-17 weight percent Al2O3;14-17.5 weight percent CaO;6-<8.75 weight percent MgO; and0-1 weight percent TiO2; wherein the amount of Na2O is 0.09 weight percent or less, the CaO/MgO ratio on a weight percent basis is greater than 2.0, and t
1. A glass composition comprising: 60-62 weight percent SiO2;14-17 weight percent Al2O3;14-17.5 weight percent CaO;6-<8.75 weight percent MgO; and0-1 weight percent TiO2; wherein the amount of Na2O is 0.09 weight percent or less, the CaO/MgO ratio on a weight percent basis is greater than 2.0, and the glass composition is substantially free of B2O3. 2. The glass composition of claim 1, wherein the glass composition is substantially free of Na2O. 3. The glass composition of claim 1, wherein the (MgO+CaO) content is greater than 21.5 weight percent. 4. The glass composition of claim 1, further comprising 0-1 weight percent K2O and 0-2 weight percent Li2O. 5. The glass composition of claim 4, wherein the (Na2O+K2O+Li2O) content is less than 1 weight percent. 6. The glass composition of claim 1, wherein the glass composition is fiberizable, has a liquidus temperature of less than 1250° C., and has a forming temperature of less than 1300° C., wherein the difference between the forming temperature and the liquidus temperature is at least 50° C. 7. The glass composition of claim 1, further comprising at least one rare earth oxide in an amount between about 0.1 and 3.0 weight percent. 8. A glass fiber formed from the glass composition of claim 1. 9. The glass fiber of claim 8, wherein the glass fiber has a Young's modulus greater than 80 GPa. 10. The glass fiber of claim 8, wherein the glass fiber has a Young's modulus greater than 85 GPa. 11. The glass fiber of claim 8, wherein the glass fiber has a Young's modulus greater than 87 GPa. 12. A glass composition comprising: 60-62 weight percent SiO2;14.5-16 weight percent Al2O3;14.5-17.5 weight percent CaO;6-7.5 weight percent MgO; and0-1 weight percent TiO2; wherein the amount of Na2O is 0.09 weight percent or less, the CaO/MgO ratio on a weight percent basis is greater than 2.0, and the glass composition is substantially free of B2O3. 13. The glass composition of claim 12, wherein the glass composition is substantially free of Na2O. 14. The glass composition of claim 12, wherein the (MgO+CaO) content is greater than 21.5 weight percent. 15. The glass composition of claim 12, further comprising 0-1 weight percent K2O and 0-2 weight percent Li2O, and wherein the (Na2O+K2O+Li2O) content is less than 1 weight percent. 16. The glass composition of claim 12, wherein the glass composition is fiberizable, has a liquidus temperature of less than 1250° C., has a forming temperature of less than 1300° C., and wherein the difference between the forming temperature and the liquidus temperature is at least 50° C. 17. The glass composition of claim 12, further comprising at least one rare earth oxide in an amount between about 0.1 and 3.0 weight percent. 18. A glass fiber formed from the glass composition of claim 12. 19. The glass fiber of claim 18, wherein the glass fiber has a Young's modulus greater than 80 GPa.
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이 특허에 인용된 특허 (6)
Hofmann, Douglas A.; McGinnis, Peter B., Composition for high performance glass, high performance glass fibers and articles therefrom.
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